package cn.eric.game.swing;

import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

public class TestComboBox {
	   private JFrame mainFrame;
	   private JLabel headerLabel;
	   private JLabel statusLabel;
	   private JPanel controlPanel;

	   public TestComboBox(){
	      prepareGUI();
	   }

	   public static void main(String[] args){
		  TestComboBox  swingControlDemo = new TestComboBox();      
	      swingControlDemo.showComboboxDemo();
	   }

	   private void prepareGUI(){
	      mainFrame = new JFrame("Java Swing Examples");
	      mainFrame.setSize(400,400);
	      mainFrame.setLayout(new GridLayout(3, 1));
	      mainFrame.addWindowListener(new WindowAdapter() {
	         public void windowClosing(WindowEvent windowEvent){
	            System.exit(0);
	         }        
	      });    
	      headerLabel = new JLabel("", JLabel.CENTER);        
	      statusLabel = new JLabel("",JLabel.CENTER);    

	      statusLabel.setSize(350,100);

	      controlPanel = new JPanel();
	      controlPanel.setLayout(new FlowLayout());

	      mainFrame.add(headerLabel);
	      mainFrame.add(controlPanel);
	      mainFrame.add(statusLabel);
	      mainFrame.setVisible(true);  
	   }

	   private void showComboboxDemo(){                                    
	      headerLabel.setText("Control in action: JComboBox"); 

	      final DefaultComboBoxModel fruitsName = new DefaultComboBoxModel();

	      fruitsName.addElement("Apple");
	      fruitsName.addElement("Grapes");
	      fruitsName.addElement("Mango");
	      fruitsName.addElement("Peer");

	      final JComboBox fruitCombo = new JComboBox(fruitsName);    
	      fruitCombo.setSelectedIndex(0);

	      JScrollPane fruitListScrollPane = new JScrollPane(fruitCombo);    

	      JButton showButton = new JButton("Show");

	      showButton.addActionListener(new ActionListener() {
	         public void actionPerformed(ActionEvent e) { 
	            String data = "";
	            if (fruitCombo.getSelectedIndex() != -1) {                     
	               data = "Fruits Selected: " 
	                  + fruitCombo.getItemAt
	                    (fruitCombo.getSelectedIndex());             
	            }              
	            statusLabel.setText(data);
	         }
	      }); 
	      controlPanel.add(fruitListScrollPane);          
	      controlPanel.add(showButton);    
	      mainFrame.setVisible(true);             
	   }
}
